[vtkusers] vtkSimpleMutexLock virtual vs. non-virtual destructor

[Julia Schnabel]

Hello, I just came across this linking warning for vtk3.1.2 (with gcc). Might be
worth fixing...
Julia

In file included from
/projects/local/vtk/vtk3.1_gcc/include/vtkMultiThreader.h:53,
                 from /projects/local/vtk/vtk3.1_gcc/include/vtkCommon.h:93,
                 from /projects/local/vtk/vtk3.1_gcc/include/vtk.h:43,
                 from my_program.cc:37:
/projects/local/vtk/vtk3.1_gcc/include/vtkMutexLock.h:103: warning: `class
vtkSimpleMutexLock' has virtual functions but non-virtual destructor

-- 
Julia Schnabel
Computational Imaging Science Group     
Division of Radiological Sciences      Tel: +44 (0)20 7955 2721
5th Floor Thomas Guy House             Fax: +44 (0)20 7955 4532     
Guy's Hospital, King's College London  mailto:julia.schnabel at kcl.ac.uk
London SE1 9RT, UK                     http://www-ipg.umds.ac.uk/j.schnabel/